Johnson Controls R-3710-3107 Restrictor This specific control knob is

This specific control knob is built to interface seamlessly with the D-shaped or splined shafts commonly found on QMark electric heaters and Berko wall heaters

these HVAC gaskets are essential for routine maintenance or emergency repairs on vintage and modern steam and hot water systems

providing a robust interface between the drive motor and the damper shaft

regardless of the fuel type or installation elevation

Johnson Controls R-3710-3107 Restrictor This specific control knob isThe Johnson Controls R 3710 3107 is a precision engineered pneumatic restrictor designed for stable airflow control in low pressure HVAC control circuits. Featuring a . 007" orifice, this color coded aqua fitting is essential for creating the necessary pressure drop in bleed type pneumatic systems, ensuring accurate signal transmission to actuators and controllers. This T fitting restrictor is constructed from high grade thermoplastic, providing